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https://issues.apache.org/jira/browse/FLINK-15995?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated FLINK-15995:
-----------------------------------
    Labels: pull-request-available  (was: )

> TO_BASE64 sql operator change operandTypeChecker from OperandTypes.ANY to 
> OperandTypes.family(SqlTypeFamily.STRING) 
> --------------------------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-15995
>                 URL: https://issues.apache.org/jira/browse/FLINK-15995
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table SQL / Planner
>    Affects Versions: 1.10.0
>            Reporter: hailong wang
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.11.0
>
>
> For the TO_BASE64 sql operator, the operandTypeChecker is OperandTypes.ANY 
> which is too large. I think we should change it to 
> OperandTypes.family(SqlTypeFamily.STRING) .
> For if users use 
> {code:java}
> testSqlApi("to_base64(11)", "AQIDBA=="){code}
> it will throw 
> {code:java}
> Caused by: org.apache.flink.api.common.InvalidProgramException: Table program 
> cannot be compiled. This is a bug. Please file an issue.Caused by: 
> org.apache.flink.api.common.InvalidProgramException: Table program cannot be 
> compiled. This is a bug. Please file an issue. at 
> org.apache.flink.table.runtime.generated.CompileUtils.doCompile(CompileUtils.java:81)
>  at 
> org.apache.flink.table.runtime.generated.CompileUtils.lambda$compile$1(CompileUtils.java:66)
>  at 
> org.apache.flink.shaded.guava18.com.google.common.cache.LocalCache$LocalManualCache$1.load(LocalCache.java:4742)
>  at 
> org.apache.flink.shaded.guava18.com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3527)
>  at 
> org.apache.flink.shaded.guava18.com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2319)
>  at 
> org.apache.flink.shaded.guava18.com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2282)
>  at 
> org.apache.flink.shaded.guava18.com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2197)
>  ... 30 moreCaused by: org.codehaus.commons.compiler.CompileException: Line 
> 206, Column 150: No applicable constructor/method found for actual parameters 
> "int"; candidates are: "public static java.lang.String 
> org.apache.flink.table.runtime.functions.SqlFunctionUtils.toBase64(org.apache.flink.table.dataformat.BinaryString)",
>  "public static java.lang.String 
> org.apache.flink.table.runtime.functions.SqlFunctionUtils.toBase64(byte[])" 
> at org.codehaus.janino.UnitCompiler.compileError(UnitCompiler.java:12124)
> {code}
> it is confusing to users.
>  



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